intrepid used in Moby Dick

Glimpses do ye seem to see of that mortally intolerable truth; that all deep, earnest thinking is but the intrepid effort of the soul to keep the open independence of her sea; while the wildest winds of heaven and earth conspire to cast her on the treacherous, slavish shore?

And brave as he might be, it was that sort of bravery chiefly, visible in some intrepid men, which, while generally abiding firm in the conflict with seas, or winds, or whales, or any of the ordinary irrational horrors of the world, yet cannot withstand those more terrific, because more spiritual terrors, which sometimes menace you from the concentrating brow of an enraged and mighty man.

...ever made by man), the peculiar perils of it, and the community of interest prevailing among a company, all of whom, high or low, depend for their profits, not upon fixed wages, but upon their common luck, together with their common vigilance, intrepidity, and hard work; though all these things do in some cases tend to beget a less rigorous discipline than in merchantmen generally; yet, never mind how much like an old Mesopotamian family these whalemen may, in some primitive instances,...

Chapters 31-33 -- Queen Mab; Cetology; The Specksnyder (92% in)

Forced into familiarity, then, with such prodigies as these; and knowing that after repeated, intrepid assaults, the White Whale had escaped alive; it cannot be much matter of surprise that some whalemen should go still further in their superstitions; declaring Moby Dick not only ubiquitous, but immortal (for immortality is but ubiquity in time); that though groves of spears should be planted in his flanks, he would still swim away unharmed; or if indeed he should ever be made to spout...

But however prolonged and exhausting the chase, the harpooneer is expected to pull his oar meanwhile to the uttermost; indeed, he is expected to set an example of superhuman activity to the rest, not only by incredible rowing, but by repeated loud and intrepid exclamations; and what it is to keep shouting at the top of one's compass, while all the other muscles are strained and half started—what that is none know but those who have tried it.

Chapters 61-63 -- Stubb Kills a Whale; The Dart; The Crotch (70% in)

Every one knows the fine story of Perseus and Andromeda; how the lovely Andromeda, the daughter of a king, was tied to a rock on the sea-coast, and as Leviathan was in the very act of carrying her off, Perseus, the prince of whalemen, intrepidly advancing, harpooned the monster, and delivered and married the maid.